The first ever 3-piece drill mounts for Michael Ryen are made in Italy. Unlike the beta titanium alloy used by many of our competitors like Airlock from Marchon, these frames are 100% pure, nickel-free titanium and still are offered at a lower price point. Barely-there bridges and end pieces are ultra-lightweight to feel like youre not wearing glasses at all. MR-174 presents a larger rectangle lens shape and sleek narrow temples.